Apparatus for straightening hot plates



Jan.24, 1939. F. UNGERER 2,144,783

APPARATUS FOR STRAIGHTENING HOT PLATES Filed Jan. 14, 1935 fly.

III

Patented Jan. 24, 1939 PATENT OFFICE APPARATUS FOR STRAIGHTENING no'rPLATES Fritz Ungerer, Pforzheim, Germany Application January 14, 1935,Serial No. 1,831

In qermany February 20, 1933 Claims.

This invention relates to an apparatus for straightening hot plates.

When straightening hot plates straightening machines the introduction ofthe plate between the rollers is mostly accompanied by greatdiiiiculties, as the hot plate often arrives at the straighteningmachine in stronglyundulated condition the edge to be introduced oftenstanding up with the result, that the plate-is folded in undesirablemanner when running into the machine.

This difilculty is overcome according to the invention.

In the apparatus according to the invention a roller having projectionsfor flattening the plate spaced along its perimeter-which projectionsmay be teeth or antifriction rollers-is mounted to rotate ahead of astraightening machine.

Fig. 1 is an end view of a machine embodying a roller for flattening theadvancing edge of the work as it is fed to the machine.

Fig. 2 is a top plan view of 1.

Fig. 3 is a partial end view of a machine of modified construction.

Fig. 4 is a top plan view of Fig. 3.

The plate 0 to be straightened is conveyed to the rollers d of the platestraightening machine on a table a through which feed rollers b project.The rollers d of the straightening machine,

are mounted in housings H one of which only is shown, it beingunderstood that the arrangement at the other side of the machine isquite similar. The upstanding end 01 of the plate c often prevents thematerial from running in smoothly and automatically between the rollers11. In order to overcome this hindrance a roller 61 having rows of teethe spaced along its perimeter and plain spaces between the rows, as shownin Fig. 2, is, according to Figs. 1 and 2, mounted on a shaft 0 inbearings o of bracket 0" secured to the housings H at the entrance sideof the plate straightening machine and rotates in the direction A whenthe machine is in operation. The teeth e successively strike theupstanding end 01 of the plate 0 and thus bend it downwards towards theinlet point of the straightening machine. This method of preliminarilyfiattening results in that the material will pass between the roller c1and the roller 1 situated therethe plate runs into the machine betweentwo guides g and h in the correct shape. The roller 1 may yielddownwardly against the action of springs ii in recesses of the brackets0'', so that in the event of any differences in the thickness in roller.

under, without assistance of the operator, so that of the plates nointerruption of the feeding of plate will occur. To prevent the edge 01,after it has moved through the rollers c1 and ,f, from penetratingbetween the upper end. of guide plate It and the roller e1, this end'isserrated and its projections or serrations hl, Fig. 2, enter between therows of teeth 'e.

Friction between the teeth and the plate is considerable. To reduce it,the teeth are replaced by antifriction members inthe apparatusillustrated in Figs. 3 and 4. The shaft 0 is mounted for rotation in thedirection of arrow A, as described with reference to Fig. 1, end plates2' are placed on the shaft 0 and rollers 7c are mounted on pivots k inspaced relation between end plates i so as to partly project beyondthem. The action of the rollers k is similar to that of the teeth e,Figs. 1 and 2, but the friction is reduced. The guide plates 9, h arehere replaced by a pair of guide rollers m, n.

I claim:--

1.,An apparatus for straightening hot plates, comprising in combinationwith a hot plate straightening machine, means for feeding the plates tothe straightening machine, and a preliminary straightening device on thefront side of said straightening machine above said plate feeding means,said preliminary straightening device consisting in a preliminarystraightening roller rotatable in the direction of travel of thework andarranged above said feeding means, projections on'said roller adapted tostrike upon and preliminarily straighten the plate and particularly tobend down the upstanding front end of the plate, a counterrollerarranged under side preliminarily straightening roller adapted tocooperate with said straightening roller to guide the plates thereunder,and springs, supporting said'counterroller to enable said counterrollerto yield downwardly in the case of plates of irregular thicknesses.

2. An apparatus for straightening hot plates, comprising in combinationwith a hot plate straightening machine, means for feeding the plates tothe straightening machine, and a preliminary straightening device on thefront side of said straightening machine above said plate feeding means,saidpreliminary straightening device consisting in a preliminarystraightening roller rotatable in the direction-of travel of the workand arranged above said feeding means, projections arranged at uniformdistances apart in the width of said roller adapted to strike upon andpreliminarily straighten the plate and particularly to bend down theupstanding front end of the plate, the gaps between said projectionsforming annular grooves, a guide plate leading from said preliminarilystraightening roller to the admission point of the straighteningmachine, and projections on the front edge of said guide plate engagingin said grooves, a counterroller arranged under said preliminarilystraightening roller adapted to cooperate with said straightening rollerto guide the plates thereunder, and springs supporting saidcounterroller to enable said counterroller to yield downwardly in thecase of plates of irregular thicknesses.

3. An apparatus for straightening hot plates, comprising in combinationwith a hot plate straightening machine, a substantially cylindricalelement mounted to rotate ahead of the machine, said element having atintervals protrusions projecting from the periphery of said element forflattening the plates, a counterroller arranged under said straighteningroller to guide the plates thereunder, and springs supporting saidroller to enable it to yield downwardly, in the case of plates ofirregular thicknesses.

4. An apparatus for straightening hot plates, comprising in combinationwith a hot plate straightening machine, a substantially cylindricalelement mounted to rotate ahead of the machine, said element having atintervals protrusions projecting from the periphery of said element forflattening the plates, said element being composed of a cylindrical bodyand of antifriction members spaced along and projecting beyond theperiphery of said body, a counterroller arranged under saidstraightening roller to guide the plates thereunder, and springssupporting said roller to enable it to yield downwardly, in the case ofplates of irregular thicknesses.

' 5. An apparatus for straightening hot plates, comprising incombination with a hot plate straightening machine, a substantiallycylindrical element mounted to rotate ahead of the machine, said elementhaving at intervals protrusions projecting from the periphery of saidelement for flattening theplates, said element composed of a shaft, twoend plates on said shaft, and antifriction rollers journalled in saidend plates spaced apart in a circle coaxial to said-shaft and projectingbeyond the periphery of said plates, a counterroller arranged under saidstraightening roller to guide the plates thereunder, and springssupporting said roller to enable it to yield downwardly, in the case ofplates of irregular thicknesses.

FRITZ UNGERER.

